Maleic anhydride, also known as maleic anhydride (MAH), is the anhydride of maleic acid. It is a colorless or white solid with sour taste at room temperature, and the molecular formula is c4h2o3.

1. Used to produce 1,4-butanediol γ- Butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin and other raw materials are also used in and pesticides.

2. Act as collector in metal beneficiation.

3. It is used in organic synthesis and also as an intermediate of synthetic fiber.

4. Maleic anhydride is an important basic raw material of unsaturated organic anhydride. In pesticide production, maleic anhydride is used to synthesize diethyl maleate, the intermediate of organophosphorus insecticide malathion, 1-phenyl-3,6-dihydroxypyridazine, the intermediate of pyridazinon, and the intermediate of pyrethroid insecticide permethrin, fungicide and captan. In addition, it is also used to produce unsaturated polyester resin and ink additives.

5. It is mainly used to produce unsaturated polyester resin, alkyd resin and long-acting iodamine.

6. Maleic anhydride (108-31-6) is a commonly used and important basic organic chemical raw material.